Billiards: Hands down one of the top places in Cambridge (Boston for that matter!) for catching live music, T.T.'s has an appeal and energy level all its own. A relaxed, yet fiercely indie vibe engulfs the space, and the crowds who gather here night to night certainly know what's good and bad when it come music (rumor has it, local acts queue up to play here). The staff itself is a source of entertainment for first-timers, and it's quite fun to watch the bartenders interact with regulars. NB If you wait until the night of the show and try to buy tix at the club, make sure you bring cash — they don't accept plastic.